Boiler patch-plate.



PATENTED JAN. 17, 1905.

W. GROSS.

BOILER PATCH PLATE.

APPLICATION FILED SEPT.6.1904.

N m m m I mm a 6 w m M Patented January 17, 19L 5.

ATENT OFFICE.

WILLIAM CROSS, OF I'VINNIPEG, CANADA.

BOILER PATCH-PLATE.

SPECIFICATION forming part of Letters Patent No. 780,324, dated January 1'7, 1905.

Original application filed May 25, 1904, Serial No. 209,765. Divided and this application filed September 6, 1904. Serial No. 223,548.

- sheet of copper or other soft metallic sub stance which will Withstand the heat, water, or steam, one edge of which is turned up and bent back upon itself which sheet serves as a liner and is placed between the plates to be joined.

My invention is particularly adapted for use in patching locomotive and other types of boilers, fire-boxes, and the like, and for convenience of description I shall hereinafter describe my invention as used in connection with a patch for locomotive fire-boxes, loco- {notive and other types of boilers, and the ike.

Generically my invention also embodies a patch or other plate of any desired shape and size and a copper liner interposed between such plate and the plate to which it is to be joined, so as to insure a steam-tight joint between the two plates.

WVith other objects in View, which will be hereinafter apparent, the invention comprises certain novel construction and combination of parts, all of which will be hereinafter de-.

scribed in detail, specifically pointed out in the appended claims. and illustrated in the accompanying drawings, in which Figure 1 is a face View of a portion of the [ire-box with my improvement applied, parts being broken away. Fig. 2 is a cross-section thereof on the line 2 2 of Fig. 1. Fig.2 is an enlarged detail view of a portion thereof. Fig. 3 is a detail view of the adjoined ends of the copper liner.

Referring now to the accompanying drawings, in which like numerals of reference indicate like parts in all the figures, l designates a boiler lire box, which may be of the ordinary construction and which per se forms no part of this invention. \Vhen used to patch boilers and the like. the plate 2 is formed of any desired shape, depending upon the nature of the break in the boiler-plate, and includes the ordinary stay-bolt apertures 2, as shown. Interposed between the plate 2 and the boiler or fire-box I is a copper strip or liner 8, which may be cut out of a single sheet or which may be formed in a strip having its free ends 3 3 abutting one another, and one of said ends 3 has an overlapping ear 3 to overlap the other end 3", as shown.

3 designates a rim or head formed by.dou bling over the inner edge 3" of the strip 3 to make an eifective steam-tight joint.

The plate 2 and the copper strip 3 are secured to the boiler-plate 1 by the steam-tight plugs 4, as shown.

From practical experience I have found that in joining boiler-plates, particularly in joining a patch-plate to the boiler, and especially patching in locomotive lire-boxes as now known to the art, such patching is liable to give more or less trouble after a few months service owing to the fact that the patclrplates crack from the securing-bolts outwardly, such patches not being protected by the inside calking which is found in most new work-7 0., in the primary union of the plates together by riveting, the universal practice being to calk both seams. I have therefore designed my patch-plate and formed the liner with an upturned edge to act as a substitute for the back calking. This liner may be applied not only in securing a patch to the boiler, but in primarily uniting the boiler-plates together to do away with the usual calking of the seams. In making the joints between the two plates 1 hold the plates to be joined in their relative positions in any approved manner, the copper liner being held in position at the same time. I then adjust any suitable drill and tapping machine over the plate where the hole is to be drilled. After the drilling-machine has been placed in position and the hole is drilled and tapped, a screw-plug is then inserted to hold the two plates together in any approved man+ ner, preferably in the manner disclosed in my copending application, Serial N o. 209,765,filed May 25, 1904, of which this application forms a divisional part.

While I have described my invention as adapted for use in patching boilers and fireboxes, ($20., yet I desire it understood that the same can be used in the primary construction of the boiler or at any place where a water or steam tight joint is to be secured between metallic plates. The invention, in other words, may be used in uniting any iron or steam plates whenever it is desired to obtain a steam or water tight joint, be it in boiler building or repairing or ship building or repairing and the like. v

I desire it understood that I do not confine myself to the exact construction and arrangement of parts, as it is obvious that slight changes in the detail construction and arrangement of parts may be made without departing from the scope of the appended claims.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, operation, and many advantages of my invention will be readily understood by those skilled in the art to which it appertains.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. A patch for boilers and the like, comprising a'patch-plate adapted to be secured to the boiler-plate, and a liner of soft metal interposed between said patch-plate and the boilerplate, said liner including an edge folded over upon itself to form a calk for the joint between the patch and boiler plates.

2. A patch for boilers and the like, comprising a patch-plate adapted to be secured to the boiler-plate, and a liner of soft metal interposed between said patch-plate and the boilerplate, said liner having an edge folded over upon itself to form a calk for securing the said patch to the boiler-plate, said means including screw-plugs, for the purposes specified.

3. A means for repairing boilers and the like,

comprising a patch-plate and a liner, said liner consisting of a sheet-metal strip of soft metal having its ends abutting, one of said abutting ends being formed with an overlapping ear, and said liner-strip including an edge folded back upon itself to form a calk, for the purposes specified.

4. A device of the character described comprising in combination with a pair of plates, a soft-metal liner interposed between said plates, said liner having an edge folded back upon itself to form a calk for the joint between the plates.

5. A device of the character stated comprising in combination'with a pair of plates, a softmetal liner interposed between said plates, said liner having an edge folded back upon itself to form a calk for the joint between the plates, and means for securing said two plates and said liner together, said means including plugs or rivets, substantially as shown.

6. A liner for boiler-plates comprising a soft-metal member adapted to be interposed between said plates, said liner having an edge folded back upon itself to form a calk, substantially as shown and for the purposes described.

7 A liner for joined boiler-plates comprisinga soft-metal strip having its free ends abutting one another, one of said ends having an overlapping ear, for the purposes specified.

8. A liner for boiler-plates comprising a soft-metal strip having its free ends abutting one another, one of said ends having an overlapping ear, said strip having one edge folded back upon itself to form a calk, substantially as shown and for the purposes specified.

WILLIAM CROSS.

Witnesses:

C. GRABURN, KINGSFORTH F. A. GRABURN. 

